Self-opening die head



April 6,1926.

A. F. BREITENSTEIN SELF ornum DIE Hmm Filed June 25, 1924 2 Sheets-Sheet 1 April 6 1926 1,579,912

A. F. BREITENSTEIN SELF PENING DIE HEAD Flled June 25( 1924 sheets-'sheet 2 `abutment of the sleeve, the said trippingstop.

Patented Apr. 6, 1925.

y UNITED STATES A *A 1,579,912 PATENT oFFi er..`

ALBERT E. BnErTENsTEN, or'NEw HAVEN, CONNECTICUT, AssIGNoR To THE GEC- METRIC `Toon Co.oF NEWHAVEN, CCNNECTICUT, k.a oonronATroN.

.sELE-orENING DIE HEAD.

ApplieationV i'led June 25,'

To all'whom t may concern'. n

VBe it' known that I, ALBERT F. vBRnrrlnv-y STEIN, a citizen of the United States, residing at N ew Haven, in `thefcounty of' New Haven and State of Connecticut, have invented a new and useful Improvement in Self-Opening Die Heads;'and Ido hereby `declare the following, Vwhen taken, in connection with the accompanying` drawings and the characters of reference marked thereon, to be a full, clear, and exact description ofthe same, .and which said drawings constitute part of this applicati-on, and'represent, in- V Fig.v 1 a view in frontelevationof a selfopening die-head constructed in accordance with my invention. n

Fig. 2 a view thereof in longitudinal central section. Y `i Y Y Fig. 8y aview thereof in transverse'section on the line 3 3 of F ig.V 2. Fig. 4c a view in front elevation of the diebody stripped.

Fig. '5 a broken, line 5 5 of Fig. 1. l

. Fig. 6 a similar viewon theline 6--6fof Fig. 1.

Fig. 7 a detached tripping-member. y

` Fig. 8 a detached, perspective view of the locking-segment. v y I Fig. 9 a corresponding View of the complementary filler-segment.

- My invention relates toan rimprovement in self-opening die-heads, whether rotary or stationary, the object being tovprovide' 4the` same Vwith simple, effective and ydurable means for locking and tripping the chasers. VWith thesey ends in view, my invention consists in a self-opening die-head characterized by having a radially-movable locking-V segment mounted in itsadjusting-ring in position to be moved outward into engagement with yanjabutnient inthe operatingsleeve,means for so moving the said segment, and aV tripping-member mounted in the operating-sleeve` and co-acting with the said locking-segment for .forcing the same inward, out of engagement with .thesaid Vsectional view on the perspective View of the member having a projection beyondy the periphery of the sleeve, whereby it is engaged for operation. by a suitably arranged My invention-furtherconsists' a self- 23 having neither radial nor endwise move- "1924. serial No. maw/Q `opening die-head having'certain details of construction as willbefhereinafter described andparticularly recited in the claims.

' In carrying out my invention, as herein shown, Iemploy a pivotal tripping-member `1() located in a radial slot l1 in the ope'rat-r ing-sleeve 12 of the ydie-head. At its inner lend, the said memberl() is yformed with a transverse hole 13, receiving a 4pin n 14C on which the member has swinging movement and which is'gmounted `in ythe saidk sleeve.k The outer end of the said member' is formed with a limiting-opening lfreceivinga stoppinv 16, also kmounted in the sleeve, and of smaller diameter than the ydiameter yof the said opening, whereby theswinging move-r` ment of the said member is limited. Upon the curved outer edge of its louter lend. the said lmember is formed with a curved tripping-lug .17, designed to co-act with a suitable stop properly located inthe machine in the ordinary manner and not shown herein.

`The curved inner edge of the said member `rides upon and yco-acts directly with the correspondingly-curved periphery of a radially-movable locking-segment 18 located in a circumferential groove 19 in the adjusting- Vring 20 of the die-head, the said ring being ,internally threaded, asv usual (Fig. 2), for

being screwedlupon the threaded Lportion of the tubular shank 21 ofthe skeleton diehead'body 22. `Diametrically 'opposite the locking-'segment 18` and in the samek groove 19 I locate i a vcomplementary yfiller-segment ment with reference to the adjusting-ring 20 in which it is mounted. At its ends, the

said filler-segment is formed 'with slots 24:

Vreceiving helical springs 25 respectivelyv abutting against* the ends ofi` the vlockingsegment l18 and' exerting a constanteort to move the same radially outward forthe engagement ofits forward outer edge with an abutment-shoulder 26 forming the forward wall rof an eccentric k"groove 27 leadingout ofthe bore 28. of they operating-sleeve 12. e

The eccentric character of the locking-groove k27 is clearly shown in Fig. v

Toprevent the en'dwis'e displacement of rthe filler-segment 23 vin the groove 19, itl

is provided with' a key 29 fastened by a rivet 30, andv projecting intoa keyway 31 in the sleeve 12. The filler-segment 23 is also provided in. itsV external peripherywith a transverse clearance groove 32 (Fig. 9) for the clearance oit the stu'dlilre inner` lend of a stop-screw 84 (Figs. 2 and 3) mounted in the ring 12 for limiting the movement of the operating'V-sleeve 152'A in both directions upon the adjusting-'ring 20'-,

To prevent the relative rotation of the operating-sleeve 12 and the skeleton' die'- head body 22, the said Vsleeve is provided at opposite points in its forward face with two guide-pins 35 (Figsd and *6),* entering corresponding holes 36 in the body22, the said pins reciprocating backV and forth. in the holes 36, as the sleeve is'moved. backV and forth in the operation'- of thetdev'ice. y Y For the self-opening action of the diehead, I employ two helical springs (Figs. l and 5) located opposite each other and extending at their opposite ends into deep bores 38 in the operating-sleeve and compleinentary' bores 39 in the body ,22.l p

kAs herein shown, my improveddie-head is provided with fourlequidistant chasers 40 retained in place by four segmental plates t1 secured to the forward face of the body 22 by rivets 42. Spring-actuated plunger-s 43 exert a constant eiiort to move the chasersoutward into engagement with the beveled inner edge of the outer end of the sleeve 12 as shown in Fig. 2. But the specific character of the chasers andthe inode of mounting and operating them has nothing to do with my presentinvention, being made the subject-matter of a co-pending application, tiled by me in even date herewith.v So Jfar as my improved tripping-member isconcerned, it may be used in self-opening dieheads furnished with chasers of different construction, mode or mounting and operation. l Y

As shown herein, my improved self-,opening die-head is in its closed position ready for a threading operation, at which time the locli'ingasegment 1S is pushed outward into the eccentric' groove 27 in the sleeve 12, in which position its forward edge coacts with `the forward wall 26 of the said groove, whereby the sleeve is loclied in its forward position, in *which holds the chasers O in their cutting positions against the tension ot their spring-actuated lungers, and the sleeve 12 againstvtlie action of the helical springs 37, the said plungers tending to move the chasers outward, and the said .springs tending to iiiov'e the sleeve rearward. Y

At a predetermined pqnt in the threading operati-'011, the lug' 17 of the trippii'ig-in'ember 10 is broughtiiito Contact with an adju'stablek st op or abutment, setin the usual and well known manner, according to the character ot the workv to be done. Wvhen this engagement taires' place, the trippingiiiemblr 1 0 is iorcedinward, rocking on the i 1 1 Y le. whereby the leaving-'Sealant 4is forced inward' against the tnsi fthe which is" now released to the action of the opening-springs 31, whereupon the sleeve is moved rearward and the critters released for being moved radially outward by the action of their spring-actuated plunger-s.

To permit the sleeve 12 to move `iol-ward fromr its tripped to its Chaser-closing position, the locking-segment 18 is formed with a peripheral bevel la (Figs. 2 and S), which is engaged inthe outward movement of the sleeve at the point 45 thereof, whereby the segment is camined inward andi the sleeve allowed to ride over it until the segmental groove 26 is brought into line with the segment, which is their lifted into its locked position, as shown in Fig. 2f, by the springs 25.

As already explained, my improved tripping-device is not limited to use with the chasers herein shown and described, since it may be embodied in self-opening die-heads having other forms of chasers and means lfor mounting the same; nor do Ilimit n selfA to the exact tripping-device herein shown and described, since the same may be modiiied in details of construction to meet avariety of conditions of use. I would, therefore, have it understood that I do not limit myself to the exact tripping-mechanism shown and described but hold myself at liberty to make such departures therefrom as fairly fall within the spirit and scope of my invention.

I claim:

1. In a self-opening die-head, the combination with the body thereof, of an ad- Vjusting-ring threaded upon the said body,

an operating-sleeve having sliding axial movement with respect to the said body and having upon its inner face a semi-circular,

eccentric lockingabutment, a radially-mow able locking-segment carried by the said adjusting-ring in position for engagemeiuI with the said abutment of the sleeve, yielding means :for moving the said locking-segment bodily outward into engagement with the said abutment, and a tripping-member inoui'ited in the operating-sleeve in position tobe externally-operated and adapted to engage with the said `lookin'gsegment for forcing the saine bodily inward from its eccentric Alocking-position i-nl which it engages with the said eccentric lockingeabutnient, into its concentric releasing-position in which latter it clears the said abutment.

*i 2. In self-opening die-head, the combination with the body thereof, of an aujusting-ring threaded upon the said body and having a peripheral annular groove, an operating-sleeve having sliding axial nievenent with respect to' the Saidbody and hav.`

ing upon its inner facea semi-circular ec-k in opposition to the said locking-segment therein, spiings interposed between the ad-k jacent ends of the said segmentsv for moving the said locking-segment bodily outward into its eccentric locking-position, and a tripping-member mounted in the sleeve in position to be externally operated and adapted to engage, when forced inward, with the locking-segment for forcing the same bodily inward from its eccentric locking-position into its concentric releasingposition, invwhich latter it clears the'l said l n f bination with the ,body thereof, of anI adabutment. n -l 3.111 a self-opening die-head, the conibination with the body thereof, of an ad-a justing-ring threaded directly upon the said body and vhaving an Aannular peripheral groove, an operating-sleeve having bearing upon the said ring and body andy formed with an eccentric locking-grooveleading out of its bore, a radially-movable locking-segment located in the groove in the said ring, a complementary filler-segment located in the said groove in opposition to the said locking-segment, means for bodily moving the locking-segment radially into the eccentric,

locking-groove leading out ofthe bore of the said sleeve, and a tripping-member located in a radial slot in the sleeve in posi tion to engage with the outer lperiphery of Vthe locking-segment for forcing the saine bodily inward against the action 'of the said means, from. its eccentric locking-position into its concentric releasing-position, in which latter it clears the said abutment.

4. In a self-opening die-head, the combination with the body thereof, ofan adf vjusting-ring threaded upon the said body and having an annular peripheral groove,A

an operating-sleeve having sliding axial movement with respect to the said body, a radially-'movable locking-segment located in the ysaid groove in the said ring, a fillersegment located in the' said groove in opposition to `the said locking-segment, springs interposed betweensthe adjacent ends of the segments for moving the locking-segment kbodily outward into position for engagement -with the sleeve for lockingcthe same in its closed position, vand a tripping-member pivotally mountedin the said sleeve in position to engage'with the said locking-segment.

for forcing the same bodily inwardfor unlocking the sleeve, the said tripping-member projecting from the periphery of the sleeve inposition to be engaged for its operation.

Inaself-opening die-head, the conirupon its inner face with, a semi-circularV `eccentric locking-abutment, a radially-movable locking-segment carried bythe said' adjusting-rmg in position for engagementwith the said abutment of the sleeve, and formed with ay cam-surface upon its outer face,

yielding means for moving the said locking-segment into engagement with the said abutment, and a tripping-member mounted inthe operating-sleeve in position to be eX- ternally operated and. adapted to engage with the saidy locking-segment for forcing the same bodily inward from its eccentric locking-position, in which it engages with the said eccentric locking-abutment, into its concentric releasing-position, in which ylatter it clears, the said abutment, the said camsurface' of the` lockingsegrnent being engaged by the operating-sleeve to permit the die-head to be resetl specification." 4 Y Y ALBERT F. BREITENSTEIN.

In testimony whereof, have signed'this 

